Joining press for joining the ends particularly of a conveyor belt and the like

1. A joining press for joining the ends particularly of a conveyor belt and the like, comprising;

lower and upper heating plates;

pusher pads engaged on said heating plates in order to apply a necessary pressure;

reaction beams supporting said plates to contain a load applied by said pusher pads, said reaction beams comprising lower plate portions arranged for acting on said pusher pads, and said reaction beams comprising upper covering portions arranged distally from said lower plate portions;

pairs of mutually arranged opposite seats each provided in said lower plate portions and said upper plate portions; and

reinforcement lamina elements removable inserted and accommodated in said pairs of mutually arranged opposite seats and extending between said lower plate portions and said upper covering portions of said reaction beams whereby to vary a rigidity of said reaction beams.

2. The joining press according to claim 1 , wherein said reaction beams have a substantially constant transverse cross-section.

3. The joining press according to claim 1 , wherein said reaction beams are each provided by means of an extruded element.

4. The joining press according to claim 1 , wherein said lower plate portions are each provided externally with engagement wings for coupling to the corresponding heating plate.

5. The joining press according to claim 1 , wherein said reaction beams each have a central partition which protrudes from said lower plate portions and blends at an other end with said upper covering portions.

6. The joining press according to claim 5 , wherein said reaction beams each have, on said covering portions, outer seats defined on mutually opposite sides.

7. The joining press according to claim 1 , comprising at lateral edges of said lower plate portions, guides for connecting a membrane which defines a pneumatic pusher pad in cooperation with said lower plate portions.

8. The joining press according to claim 1 , wherein said heating plates each have, in a downward region, a substantially flat outer face flanked by an insulating resistor, which is positioned by means of a spacing insulator, said spacing insulator being retained in position by an insulating body which is provided laterally with lips which protrude with respect to a respective one of said plates and can be coupled to said wings.

9. The joining press according to claim 1 , comprising ducts for the cooling water on longitudinal edges of said heating plates.

10. The joining press according to claim 8 , comprising means for constraining a longitudinal moment between said reaction beams and said heating plates, which are constituted by pins which can be inserted in a threaded seat defined by a block which can be accommodated within said outer seat, said pins intersecting the protruding lips of said insulating body connected to said heating plates.